Make location getter work like Corelocation.location getter (#205)

* Make location getter work like Corelocation.location getter

It is now optional

* Applying mbrandonw review comment

Author: mackoj

Sources/ComposableCoreLocation/Interface.swift

@@ -268,7 +268,7 @@ public struct LocationManager {
   @available(watchOS, unavailable)
   public var isRangingAvailable: () -> Bool = { _unimplemented("isRangingAvailable") }
 
-  var location: (AnyHashable) -> Location = { _ in _unimplemented("location") }
+  var location: (AnyHashable) -> Location? = { _ in _unimplemented("location") }
 
   public var locationServicesEnabled: () -> Bool = { _unimplemented("locationServicesEnabled") }
 
@@ -389,7 +389,7 @@ public struct LocationManager {
   @available(tvOS, unavailable)
   public func heading(id: AnyHashable) -> Heading? { self.heading(id) }
 
-  public func location(id: AnyHashable) -> Location { self.location(id) }
+  public func location(id: AnyHashable) -> Location? { self.location(id) }
 
   @available(tvOS, unavailable)
   @available(watchOS, unavailable)

Sources/ComposableCoreLocation/Live.swift

@@ -128,6 +128,8 @@ extension LocationManager {
 
     manager.locationServicesEnabled = CLLocationManager.locationServicesEnabled
 
+    manager.location = { id in dependencies[id]?.manager.location.map(Location.init(rawValue:)) }
+    
     manager.requestLocation = { id in
       .fireAndForget { dependencies[id]?.manager.requestLocation() }
     }